bpf: Add missing return to resolve_btfids

int sets_patch(struct object *obj) doesn't have a 'return 0' at the end.

Fixes: fbbb68d ("bpf: Add resolve_btfids tool to resolve BTF IDs in ELF object")
Signed-off-by: Stanislav Fomichev <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]

Author: fomichev

tools/bpf/resolve_btfids/main.c

@@ -566,6 +566,7 @@ static int sets_patch(struct object *obj)
 
 		next = rb_next(next);
 	}
+	return 0;
 }
 
 static int symbols_patch(struct object *obj)